Boat-propelling mechanism.



S.ARMACZKL BOAT PROPELLING MECHANISM.

APPLICATION FILED JAN,18. 1915.

1,,139A7L Patented May18,1915.

6/ @313 I {WWW THE NORRIS PETERS CG. FHOTO-LITHO. WASHINGTON. D. c

STANISZLAW ARMACZKI, OF NA'IBONA, PENNSYLVANIA.

BOAT-PROPELLING MECHANISM.

Specification of Letters Patent.

Patented May 18, 1915..

Application filed January 18, 1915. Serial No. 2,849.

To all whom it may concern Be it known that I, STANISZLAW ARMAo- ZKI,subject of the Emperor of Russia, residing at Natrona, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Boat-Propelling Mechanism, of which the followingis a specification.

This invention relates to certain new and useful improvements in boatpropelling mechanism.

The primary object of this invention is to provide oppositely arrangedalternately reciprocating foldable pushers upon a boat whereby the boatis given successive forward impulses.

A further object is to provide rearwardly movable pushers at the sternof a boat, the same being operable by a motor within the boat andadapted by successive rearward thrusts to force the boat forward uponits course under the direction of the rudder.

With these general objects in view and others that will appear as thenature of the invention is better understood, the same con sists in thenovel combination and arrangement of parts hereinafter more fullydescribed, illustrated in the accompanying drawings and set forth in theappended claim.

In the drawings forming a part of this application and in which likedesignating characters refer to corresponding parts throughout theseveral views, Figure 1 is a top plan view of a boat provided with thepresent invention. Fig. 2 is a view of one of the propulsion members orpushers, the blades being shown in their unfolded operative positionsand in vertical longitudinal central section. Fig. 3 is a View similarto Fig. 2 but with the blades inoperatively folded as positioned uponthe return forward stroke of the pusher. Fig. 1 is a detail perspectiveview of the hinged end portion of one of the pusher blades, and Fig. 5is a perspective view of the operating member of one of the pushersdetached.

Referring more in detail to the drawings, the present invention isillustrated as installed upon the boat 10 which is provided with a.steering rudder 11 centrally positioned upon the boat stern 12.

An operating member 13 of the form illustrated in Fig. 5 and beingsubstantially T- shaped with a shaft 14 and having a cross head 15thereon, is slidably mounted longitudinally of the boat adjacent eachrear corner thereof and with the shafts 1a of such members slidablyextending through rectangular bushings 16 which are passed through theboat stern 12, it being noted that the shafts 14 are rectangular incross section and that the heads 15 are positioned in the samehorizontal plane rearwardly of the boat stern and at a point below thenormal water level.

Each of the shafts 14 projects inwardly of the boat and extends betweenspaced guide strips 17 which are provided with longitudinal grooves 18upon their adjacent faces for the sliding reception of the block 19. Theblock 19 is secured to the free inner end of the shaft 14: of theoperating member by such means as the bolts 20, it being noted that anysliding reciprocatory motion which is imparted to the blocks 19 willmove the operating member 13 which is secured thereto.

A motor 21 of any desired form and herein illustrated as a steam enginehaving oppositely arranged piston cylinders 22 provides the propellingmeans for the operating members. The reciprocating piston (not shown) ofeach of the cylinders has a rearwardly extending piston rod 23, whilethe rear end of each of said rods is hingedly connected as at 2 1 to theoppositely-arranged blocks 19 of the operating members.

Oppositely arranged foldable blades 25 are hinged as at 26 to theopposite upper and lower sides of the heads 15, which heads are providedwith tapered sharpened rear edges 27 positioned between the pair ofblades carried thereby when the blades are folded as shown in Fig. 3.The pusher blades 25 are substantially dish-shaped and have theirbottoms 28 forwardly positioned and being in a plane substantiallyparallel with the boat stern when the said blades are operatively openas shown in Fig. 2.

It will thus be seen that when the blades upon the operating member areso operatively positioned as also shown with respect to the left-handpusher in Fig. 1, a movement of the piston rod of such operating memberrearwardly will rearwardly move the operating member, while its bladesare open, which will result in exerting a forward impulse to the boat byreason of the rear movement of the pusher through the water beneath thesurface of which it is positioned. Upon the return inward reciprocationof the cated in Fig. 3, and with respect to the right-hand pusher inFig. 1, the blades will fold upon the carrying head 15 by means of thehinges 2G and by reason of the pressure of the water during the forwardmovement of the head and thereby allow a free return movement of theoperating member. While the motor and its piston rods are designed forcontinuous operation, subject to the control of the engineer of theboat, the pushers will be alternately reciprocated and the rudder 11 isdesigned to maintain the boat upon its desired forward course of travel.7

While the form of the invention herein shown and described is what isbelieved to be the preferred embodiment thereof, it is nevertheless tobe understood that minor changes may be made without departing from thespirit and scope of the invention as claimed.

What I claim as new is A device of the class described comprising incombination with a boat having the Gopies of this patent may be obtainedfor stern thereof provided with opposite perforations therethrough,pusher members having operating shafts slidably mounted through the saidperforations and having shafts, and alternating reciprocating powermeans operatively connected to the said blocks.

In testimony whereof'I aflix my signature in presence of two witnesses.

STANISZLAW ABMAOZKI. V

Witnesses A. KORPERTY, THORT ROGARSI.

five cents each, by addressing the Commissioner of; Patents, Washington,I). G.

